Stratigraphy	Symbol	Lithology	Comments
(youngest to oldest)			
Chambers River Formation	Prc	Siltstone, mudstone, fine sandstone	Dolerite sill
Bukalorkmi Sandstone	Prl	Quartz sandstone	Dolerite sill
Kyalla Formation	Pry	Siltstone, mudstone, fine sandstone	Dolerite sill
Moroak Formation
Sherwin Member	Prk
Prkz	Quartz sandstone
Sand-silt-mudstone & ironstone	Dolerite sill
Iron ore horizon
Velkerri Formation	Prv	Mudstone, siltstone (organic in part)	Dolerite sill
Bessie Sandstone	Pre	Quartz sandstone	Dolerite sill
Corcoran Formation
Munyi Member	Pro
Prom	Siltstone lower; with sandstone upper
Ferruginous sandstone & siltstone	Dolerite sill
Dolerite sill
Hodgson Sandstone	Prh	Quartz sandstone	Dolerite sill
Jalboi Formation	Prj	Fine sandstone, siltstone	Dolerite sill
Arnold Sandstone	Prx	Quartz sandstone	
Crawford Formation	Prr	Fine sandstone, siltstone	Dolerite sill
Mainoru Formation
Showell Member
Wooden Duck Member
Mountain Valley Limestone
Nullawun Member	Pru
Prus
Pruw
Prut
Prun	Undifferentiated
Calcareous mudstone, limestone
Mudstone-siltstone-sandstone
Mudstone, limestone
Mudstone	Dolerite sill
Dolerite sill
Limmen Sandstone	Pri	Quartz sandstone	
Mantungula Formation	Prn	Mudstone, fine sandstone, dolostone	
Phelp Sandstone	Prp	Quartz sandstone